/**
 * @file tyw_msg.c
 * @author zhengchunyu (ait_zhengchunyu@163.com)
 * @brief   修改tyw lifeng 输出传输协议
 * @version 0.1
 * @date 2023-11-28
 * 
 * @copyright Copyright (c) 2023
 * 
 */
#include "./tyw_msg.h"

static uint8_t packTxBuf[FRAME_TX_BUFFER_LEN];
static uint8_t packRxBuf[FRAME_RX_BUFFER_LEN];
static uint8_t packUserBuf[10];//数据长度
static struct frame_info_t frameDev;

uint8_t crctest;
static uint32_t cal_crc32(uint8_t *buf, int StartN, int Len, int MaxNum, uint32_t InitVal)
{
    int i;
    int n = 0;
    uint32_t crc = InitVal; // Initial value
    for (n = 0; n < Len; n++) {
			crctest = buf[(StartN + n) & (MaxNum - 1)];
        crc ^= buf[(StartN + n) & (MaxNum - 1)]; // crc ^= *data; data++;
        for (i = 0; i < 8; ++i) {
            if (crc & 1)
                crc = (crc >> 1) ^ 0x04C11DB7; // 0xEDB88320= reverse 0x04C11DB7
            else
                crc = (crc >> 1);
        }
    }
    return crc;
}

uint32_t GetCrcErrCnts(struct frame_info_t *dev)
{
    return dev->errCrcVal;
}

uint32_t GetRecvLenErrCnts(struct frame_info_t *dev)
{
    return dev->errRcvVal;
}

/**
 * @brief 
 * 
 * @param data 
 */
void tyw_add_msg_data(struct frame_info_t *dev,uint8_t data)
{
    dev->pRxBuf[dev->rxCnt++] = data;
    if (dev->rxCnt >= FRAME_RX_BUFFER_LEN) 
    {
        dev->rxCnt = 0;
    }
    dev->endIdx = dev->rxCnt; 
}
uint8_t *tyw_get_rcvbuf(struct frame_info_t *dev)
{
    return dev->pRxBuf;
}
uint32_t tmpStart,tmpLen;
static void cp_data_to_user(uint8_t *pdst,uint8_t *psrc,uint32_t startInx,uint32_t len)
{
    tmpStart=0;
	tmpLen=len-FRAME_HEAD_LEN;
    tmpStart = ((startInx + FRAME_HEAD_LEN) & (FRAME_RX_BUFFER_LEN - 1));
    if(tmpStart+len >= FRAME_RX_BUFFER_LEN)
    {
        while(tmpLen--)
        {
            *(pdst++)=psrc[tmpStart++];
            if(tmpStart==FRAME_RX_BUFFER_LEN)
            {
                tmpStart = 0;
            }
        }
    }
    else
    {
        while(tmpLen--)
        {
            *(pdst++)=*(psrc+tmpStart++);
        }
    }

}
/* CRC 高位字节值表 */ 
static unsigned char auchCRCHi[] = { 
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 
} ; 
/* CRC低位字节值表*/ 
static char auchCRCLo[] = { 
0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 
0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 
0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 
0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 
0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 
0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 
0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 
0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 
0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 
0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 
0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 
0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 
0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 
0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 
0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 
0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 
0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 
0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 
0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 
0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 
0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 
0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 
0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 
0x43, 0x83, 0x41, 0x81, 0x80, 0x40 
} ; 

unsigned int CRC16(unsigned char *puchMsg, unsigned char usDataLen)
{
  	unsigned char uchCRCHi = 0xFF ; /* 高CRC字节初始化 */
  	unsigned char uchCRCLo = 0xFF ; /* 低CRC 字节初始化 */
  	unsigned uIndex ; /* CRC循环中的索引 */
  	while (usDataLen--) /* 传输消息缓冲区 */
  	{
    	uIndex = uchCRCHi ^ *puchMsg++ ; /* 计算CRC */
    	uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
    	uchCRCLo = auchCRCLo[uIndex] ;
  	}
  	return (uchCRCHi << 8 | uchCRCLo) ;
}

void tyw_frame_proc_looper(struct frame_info_t *dev,user_data_func  user_func)
{
    uint8_t *pData;
    uint32_t tmpUartBufMaxLen;
    uint32_t tmpUartBufLen;
    uint32_t tmpEndPos;
    uint32_t tmpStartPos;


    uint16_t tmpLenDest;
    uint16_t tmpLenDestCheck;
    uint32_t tmpCrc; 
    uint16_t CalcCrc;
    uint32_t SafetyCycleTimes;

    tmpUartBufMaxLen = FRAME_RX_BUFFER_LEN;
    SafetyCycleTimes = FRAME_RX_BUFFER_LEN;
    pData = dev->get_recv_buffer(dev);
    tmpStartPos = dev->beginIdx;
    tmpEndPos   = dev->endIdx;

    if ((tmpEndPos < tmpUartBufMaxLen) && (tmpStartPos < tmpUartBufMaxLen)) 
    {
        while (tmpStartPos != tmpEndPos) 
        {
            if (tmpEndPos >= tmpStartPos) {
                tmpUartBufLen = tmpEndPos - tmpStartPos;
            } else {
                tmpUartBufLen = (tmpUartBufMaxLen - tmpStartPos) + tmpEndPos;
            }
            if (SafetyCycleTimes != 0) {
                SafetyCycleTimes--;
            } else {
                break;
            }
            if ((pData[tmpStartPos] ==0x00)||(pData[tmpStartPos] ==0x01)||(pData[tmpStartPos] ==0x02)) 
            {
                if (tmpUartBufLen > 8) 
                {
                            tmpCrc = pData[tmpStartPos+6]|(pData[tmpStartPos+6]<<8);
                            CalcCrc = CRC16(pData,8);
                            if (CalcCrc == tmpCrc) 
                            {
                                cp_data_to_user(packUserBuf,pData,tmpStartPos,tmpLenDest);
                                if(user_func!=NULL)
                                {
                                    user_func(packUserBuf);
                                }
                           } 
                           else 
                           {
                           dev->errCrcVal++;
                           }
                            pData[tmpStartPos] = 0;
                            pData[(tmpStartPos + 1) & (tmpUartBufMaxLen - 1)] = 0;
                            tmpStartPos = ((tmpStartPos + tmpLenDest) & (tmpUartBufMaxLen - 1));
                            dev->beginIdx = tmpStartPos;
                        } 
                        else 
                        {
                            break;
                        }
                     
                    else 
                     {
                        dev->errRcvVal++;
                        pData[tmpStartPos] = 0;
                        pData[(tmpStartPos + 1) & (tmpUartBufMaxLen - 1)] = 0;
                        dev->beginIdx = ((dev->beginIdx + 1) & (tmpUartBufMaxLen - 1));
                        tmpStartPos = dev->beginIdx;
                     }
                } 
                else 
                {
                    break;
                }
            } 
            else 
            {
                if (tmpUartBufLen >= 2) {
                    dev->beginIdx = ((dev->beginIdx + 1) & (tmpUartBufMaxLen - 1));
                    tmpStartPos = dev->beginIdx;
                } else {
                    break;
                }
            }
        }
    }
}
static uint8_t InitPackBuf(void)
{
	return FRAME_HEAD_LEN;
}

static void tyw_user_add_qeueue(struct frame_info_t *dev,uint16_t DataLen)
{
    uint32_t SendLen;
    uint16_t tmpLen;
    uint32_t tmpCrc;
    uint16_t tmpIndex = DataLen;
    SendLen = tmpIndex;
    if (tmpIndex > FRAME_HEAD_LEN) {
        tmpCrc = cal_crc32(packTxBuf, FRAME_HEAD_LEN, tmpIndex - FRAME_HEAD_LEN, FRAME_TX_BUFFER_LEN, 0xffffffff);
        tmpLen = tmpIndex;
        tmpIndex = 0;
        packTxBuf[tmpIndex++] = 0xeb;
        packTxBuf[tmpIndex++] = 0x90;
        packTxBuf[tmpIndex++] = (tmpLen >> 8) & 0xff;
        packTxBuf[tmpIndex++] = (tmpLen >> 0) & 0xff;
        packTxBuf[tmpIndex++] = (uint8_t)(~((tmpLen >> 8) & 0xff));
        packTxBuf[tmpIndex++] = (uint8_t)(~((tmpLen >> 0) & 0xff));
        packTxBuf[tmpIndex++] = (tmpCrc >> 24) & 0xff;
        packTxBuf[tmpIndex++] = (tmpCrc >> 16) & 0xff;
        packTxBuf[tmpIndex++] = (tmpCrc >> 8) & 0xff; 
        packTxBuf[tmpIndex++] = (tmpCrc >> 0) & 0xff;
    }
    if(dev->hal_send_msg != NULL)
    {
        dev->hal_send_msg(dev->pTxBuf,SendLen);
    }
}




void tyw_send_msg(struct frame_info_t *dev,uint8_t *data, uint16_t len)
{
    uint16_t tmpIndex;
    if (len <= (FRAME_TX_BUFFER_LEN - len - 3)) {
        tmpIndex = InitPackBuf();
        memcpy(&packTxBuf[tmpIndex], (void *)data, len);
        tmpIndex += len;
        tyw_user_add_qeueue(dev,tmpIndex);
    }
}




void tyw_msg_init(struct frame_info_t **dev,hal_send_msg_t func)
{
    frameDev.head.head[0] = FRAME_HEAD1;
    frameDev.head.head[1] = FRAME_HEAD2;
    frameDev.pTxBuf         = packTxBuf;
    frameDev.pRxBuf         = packRxBuf;
    frameDev.get_error_crc  = GetCrcErrCnts    ;
    frameDev.get_error_rcv  = GetRecvLenErrCnts;
    frameDev.get_recv_buffer=  tyw_get_rcvbuf;
    frameDev.add_msg_data   = tyw_add_msg_data;
    frameDev.frame_proc_looper= tyw_frame_proc_looper;
    frameDev.send_msg = tyw_send_msg;
    frameDev.hal_send_msg = func;
    *dev = &frameDev;

}